JP2794385B2 - Structure jack-up method and jack-up device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jack-up method for lifting a structure by forcible pivoting of a balancer pivotally supported at a lower portion of the structure from the structure side, and useful for performing the method. Jack-up device for large structures, especially the traveling device part of a large traveling structure of balancer type, lifts off the ground to change direction, passes over obstacles on the ground, or installs between traveling rails with different heights or installation The present invention relates to a method and an apparatus for jacking up a large traveling structure useful for performing transfer to a part or the like.

[0002]

2. Description of the Related Art Conventionally, a jack-up operation of a ground structure has been carried out by a method of lifting the ground structure little by little manually or hydraulically or electrically between a ground and the bottom of the structure. . In principle, jack-up of a large traveling structure having a balancer type traveling device is performed in substantially the same way as this, for example, installing a large jack at the bottom of the balancer beam, jacking up the entire structure, The balancer beam of the traveling device is turned around a vertical axis to perform a direction change operation. In order to eliminate the inconvenience, inefficiency or dangerous work of installing a large jack each time under the structure, an electric jack device that can be switched by a clutch is installed in the center of the balancer beam, and the balancer beam is lifted to change direction. A device for changing the direction of the hoist which has been facilitated has already been disclosed (Japanese Utility Model Publication No. 30-1435). This is provided with a vertical axis which can be moved up and down by screw feed at the center of the balancer beam, and pushes the vertical axis toward the ground via a bevel gear by the output of the electric motor with the clutch engaged, and is supported by the balancer beam. The wheels are lifted off the ground or rails to change direction.

[0003]

In any of the methods of installing a large jack below the balancer of a large traveling structure and jacking up the entire structure, it is necessary to secure a receiving point under the structure. Therefore, a large number of auxiliary equipment for jack-up is required, and since jack-up work is performed from outside the structure, the jack installation position is limited. In general, this kind of jack-up is a work in a narrow place, so there is a problem in ensuring the safety of the work, and the jack-up work is complicated, labor and work time.

The above-described direction changing device for a hoist having a built-in electric jack must be a place where a rail pushing block serving as a receiving point of a longitudinal axis at the center of a balancer beam can be installed at the time of jacking up. Since only one shaft supports the entire weight of the hoist, it is necessary to reinforce the rail side so that the supporting position does not lower. Further, if the rigidity of the vertical axis and its supporting portion is increased so as to withstand the weight of the upper body, the overall shape becomes large and large. Further, this device has a complicated overall structure such as a plurality of bevel gears, clutch members, and a screw feed mechanism on the vertical axis, and has a problem of increasing costs.

According to the present invention, it is possible to jack up and down a structure having a balancer at a lower portion efficiently and safely in a short time without using any special accessory equipment. It is an object of the present invention to provide a jack-up method and a jack-up device, which can easily change the direction of a vehicle and transfer it to a step position.

[0006]

According to the present invention, there is provided a jacking-up method for a structure, comprising: a balancer beam having a middle portion pivotally supported at a lower bottom portion of the structure; and a balancer beam having the pivot point as a fulcrum from the structure side. It is characterized in that one side is pulled up or pushed down to the ground so that the one side or the other side of the balancer beam is raised.

In the jack-up device for a structure according to the present invention, a telescopic actuating device is pivotally mounted between one side of a balancer beam pivotally supported at the lower bottom portion of the structure at an intermediate portion thereof and the side of the structure. The telescopic actuator has a driving capacity sufficient for one side of the balancer beam to float by a reaction force from the ground side due to the driving of the actuator.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a partial side view of a heavy structure having a jack-up device according to an embodiment of the present invention.
FIGS. 2A and 2B are diagrams showing the operation when jacking up in the embodiment of FIG. 4 of this structure
In this embodiment, the balancer mounted at the corner is provided with a pin 2 at the lower bottom portion of the structure body 1 and a pivotal portion of the middle portion of the balancer beam 3, and similarly at the lower ends of both ends of the balancer beam 3 via pins 4. Thus, the ground pads 5 and 6 have a structure in which an intermediate portion thereof is pivotally supported. A telescopic actuator, in this embodiment a hydraulic cylinder 7, is pivotally mounted between the longitudinal outer end 3a of each balancer beam 3 and the side of the structure body 1. The supply of the hydraulic pressure to the hydraulic cylinder 7 is performed by a hydraulic pump unit 8 mounted on an appropriate portion of the main body 1.

In order to lift the ground pads 5 and 6 from the ground in this embodiment, first, the hydraulic cylinder 7 is driven to contract the piston rod 9 as shown in FIG. As a result, the balancer beam 3 is biased upward together with the structural body 1 with the beam outer end 3a side up with the grounding pad 6 of the end 3b opposite (inside) to the cylinder device 7 side, and the lower side grounding. The pad 5 rises from the ground 10. At this time, the ground pads 6 support the entire structure in cooperation with the ground pads attached to the balancer beams provided at the lower three corners of the structure. Therefore, an appropriate shim plate 11 is sandwiched under the floating ground pad 5, and the piston rod of the hydraulic cylinder device 7 is extended this time. As a result, as shown in FIG. 2 (B), the balancer beam 3 is lifted at the beam end 3b on the opposite side (inside) of the ground pad 5 on the shim plate 11 below the hydraulic cylinder 7 as a fulcrum.
Since a gap is formed between the ground pad 6 and the ground 10 immediately below, another shim plate 12 is inserted into this gap. Hydraulic cylinders at the other corners of the structure body 1 are sequentially urged similarly to sandwich the shim plate under each ground pad, and the above-described piston rod retracting and pushing operations are alternately performed for the hydraulic cylinders at each corner. Each time, a shim plate is inserted and stacked, increasing the height of the structure. When lowering the structure raised by the insertion of the shim plates 11 and 12 onto the ground, the shim plates are sequentially extracted from between the ground pads that have floated by the operation in the opposite manner as described above.

FIGS. 3 and 4A and 4B are partial side views showing another embodiment of the present invention. In this embodiment, wheels 14 and 15 are pivotally supported at both ends of a balancer beam 3 pivotally attached to the lower bottom portion of the structure body 1 via pivot brackets 13 so as to be able to travel on rails 16. Each bracket 13 is pivotable about the vertical axis of the bracket 13 with respect to the balancer beam 3. As described with reference to FIG. 1, the hydraulic cylinder 7 is pivotally connected between the side of the structure body 1 and the outer end 3a of the balancer beam 3, and the piston rod is retracted by the bias of the hydraulic cylinder 7 so as to be drawn. 4 (A), one side of the balancer beam 3 immediately below the cylinder and the wheel 14 thereunder float up with the other wheel 15 as a fulcrum, and the balancer on the opposite side (inner side) of the hydraulic cylinder 7 by pushing the piston rod 9. The beam end, and therefore the wheel 15 directly below it, is shown in FIG.
It rises from the rail 16 as shown in FIG. 1 and 2 (A), (B) below the raised wheel 14 or 15
As described in the above, the height of the entire structure can be increased with a shim plate or the like interposed therebetween, and the brackets 13 that support the wheels 14 or 15 with the wheels 14 or 15 floating from the rails 16 can be moved 90 degrees.゜ It is possible to change the running direction of the structure by turning. The drive capacity of the hydraulic cylinder is selected such that the balancer beam 3 is tilted about its intermediate pivot point against the weight of the structure and has a sufficient capacity to lift one end of the beam together with the structure. You.

FIG. 5 is a partial side view showing still another embodiment of the present invention. In this case, wide sled plates 17 are fixed to the bottoms of both ends of the balancer beam 3. An expansion / contraction actuator 18 similar to that of the above-described embodiment is pivotally mounted between the outer end 3a of the balancer beam 3 and the structure main body 1, and the extension / retraction operation causes one end of the sled plate 17 to be pivoted. The upper part floats from the other end of the sled plate 17. In this embodiment, a large number of roller rods 19 are arranged between a wide sled plate 17 and the ground 10, and the sled plate 17 is used as a seat for the roller rods 19 to run the structure together with the rolling of the roller rods 19. Things. It is easy to insert the roller bar 19 under the one side of the sled plate 17, and it is easy to change the direction of the roller bar 19 by 90 °, so that the structure can be turned. Becomes

Next, an actual use example of the present invention will be described for a traveling structure of a type in which wheels are provided below a balancer beam. FIG. 6 is a perspective view showing a rail arrangement when a heavy-duty structure is transported from an assembly plant onto a barge 20 to a destination, and is transferred from the quay to a land-side traveling rail 21 at the destination. is there. Bridge beam rails 23 and ramp way rails 24 are arranged on the loading / unloading yard 22 of the assembly plant adjacent to the shipping port at right angles to the quay. On the barge 20, vertical and horizontal transfer rails 25, 26 are provided. Further, a transport carriage 27 that can travel on the vertical transfer rail 25 is provided. In addition, as clearly shown in FIG. 6, the transport cart 27 is a pair of carts 27 with respect to the wheel configuration of the traveling structure to be transported.
One end of each of a and 27b is detachably bolted to each other, and four of them are provided to support four corners of the structure. On the other hand, a traveling rail 21 for moving the heavy traveling structure is laid on the quay 28 at the destination far from the assembly plant, and the structure is moved from the barge 20 to the traveling rail 21 having a different height as described later. Slide rail 29 and land side bridge beam rail 30 for transfer, land side rampway 31 connecting bridge beam rail 30 and slide rail 29, vertical side transfer rail 25 and slide rail 29 on barge 20 A sea-side rampway 32 and the like connecting the spaces are installed. In this embodiment, the slide rail 29 is constituted by a pair of slide rails 29a, 29b abutting on a pair of transport carriages 27a, 27b.

The heavy-duty running structure in this embodiment includes:
As shown in FIG. 7, a pair of wheel bearings 36a and 36b are pivotally attached to lower portions of both ends of the main balancer beam 34 via sub balancer beams 35a and 35b respectively rotatable around a vertical axis. Each wheel support 36
Motors 37 for driving the wheels are mounted on a and 36b, and a hydraulic cylinder 7 is pivotally mounted between the structural body 1 and one end of the main balancer beam 34 as in the above-described embodiment. . In the embodiment shown in FIG. 6, the heavy traveling structure travels by wheels on the bridge beam rail 23 and the ramp way rail 24 of the loading / unloading yard 22 of the shipping port, and the carriages 27 (ramp way) on the barge 20 laid sideways on the quay. (Aligned with the rail 24 at the same height) via the cradle 33 on the barge 20. In this state, the barge 20 sails to the above-mentioned destination, and after berthing at the quay 28 of the destination, the transport trolley 27 on the barge 20 moves on the rail 25 toward the land side and the seaside ramp. After passing through the way 32 and the land-side bridge beam rail 30, the structure is transferred from the carriage 27 to the land. At this time, since the height of the transport carriage 27 and the height and direction of the land-side traveling rail 21 are different, the structure is temporarily stopped. The traveling rail 21 after being transferred onto the three-stage slide rail 29
Dropped up. FIG. 7 shows a truck 2 on the sea side rampway 32.
7 shows the order in which the structures are transferred from 7 to the slide rail 29.

FIG. 7A is a side view of the structure viewed from the direction of travel of the carriage 27 when the carriage 27 travels on the slide rail 29. As shown in FIG. 7 (B), the hydraulic cylinder 7 is urged to move the end 34a of the main balancer beam 34 on the cylinder arrangement side and the sub balancer beam 3 below the end 34a.
5a and a pair of wheel bearing bodies 36a are provided on one side of the carriage 2
It emerges from 7a. Here, the transport cart 27a thereunder
Is retracted (see FIG. 7B as viewed from the arrow F in FIG. 7B).
(See (C)), the wheel bearing body 36a on this side is mounted on the upper slide rail 29a. Next, as shown in FIG. 7 (D), the hydraulic cylinder 7 is extended and urged to lift the main balancer beam end 34b on the opposite side of the cylinder 7 and the wheel support 36b below the same. The other lower carriage 27b is retracted, and the sea-side and land-side rampways 32, 31 on both sides of the slide rail 29 are removed (FIG. 7).
(E)), as shown in FIG. The white arrows in the figure indicate removal or movement.

Next, the hydraulic cylinder 7 is contracted and urged again to lift the main balancer beam end 34a and the wheel support 36a on the cylinder side from the upper slide rail 29a as shown in FIG. Then, the hydraulic cylinder 7 is urged to be pushed out, and the main balancer beam end 34b on the side opposite to the cylinder 7 and the other under the same as shown in FIG. 8 (D). Wheel support 36
b is lifted off the other upper slide rail 29b, and the upper slide rail 29b is removed. The middle slide rail and the lower slide rail are sequentially removed one by one in the same procedure, and the structure is moved onto the travel rail 21 as shown in FIG. It travels and conveys on the rail 21.

The above is the case where the traveling structure has been transported by the transport trolley. As shown in FIG.
When the above-mentioned structure has traveled on the rampway rail 38 which intersects at right angles with the cylinder 9, the hydraulic cylinder 7 is extended and contracted and urged at the position of the slide rail 29 to float each side, and FIG. As shown in (C), the sub balancer beams 35a and 35b on the floating side are turned by 90 ° about the vertical axis to adjust the running direction of the structure to the direction of the slide rail 29.

[0017]

As described above, according to the present invention, a telescopic actuator is provided between one end of a balancer beam and a structure above the balancer beam, and the balancer beam is simply operated by pushing and retracting the actuator. Can be jacked up,
Jack-up operation from the body side of the structure instead of pushing up from the ground as in the past, eliminating the need for a jack receiving point on the ground, jacking up and down at any place and without taking up work space Can be. Auxiliary equipment required for jacking up work may be at most about a shim plate. Depending on the purpose of jacking up, no auxiliary equipment is required at all, and the structure of the apparatus is extremely simple, so that large cost reduction can be achieved. Since it is a jack device integrated with the structure side, it is useful for transporting large traveling structures such as mobile cranes, etc.It is extremely easy to operate and has various excellent effects such as safety and speeding up work. Brought.

[Brief description of the drawings]

FIG. 1 is a partial side view of a heavy structure having a jack-up device according to one embodiment of the present invention.

FIG. 2 is a partial side view showing a jack-up operation in the embodiment shown in FIG.

FIG. 3 is a partial side view of a jack-up device according to another embodiment of the present invention.

FIG. 4 is a side view showing a jack-up operation in the embodiment shown in FIG.

FIG. 5 is a partial side view of still another embodiment of the present invention.

FIG. 6 is a perspective view showing an arrangement of a structure conveying rail for explaining a specific example of use of the present invention.

FIG. 7 is a diagram showing a jack-up and transfer order of a structure in a use example of the present invention.

FIG. 8 is a diagram showing a jack-up and a transfer order of a structure in a use example of the present invention.

FIG. 9 is a view showing a direction change operation by jacking up a structure in a usage example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Structure main body part 2, 4 pin 3 Balancer beam 5, 6 Grounding pad 7 Hydraulic cylinder 8 Hydraulic pump unit 14, 15 Wheels 17 Sledge plate 19 Roller rod 20 Barge 21 Running rail 22 Carry-in / out yard 27 Carriage 29 Slide rail

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B66C 23/78 B66F 3/24 B66F 19/00

Claims (4)

(57) [Claims] 1. A balancer beam having an intermediate portion pivotally supported at a lower bottom portion of a structure, and one side of the balancer beam is pulled up from the structure side with the pivot point as a fulcrum, or is pushed down toward the ground to lower the balancer beam. A jack-up method for a structure, wherein the one side or the other side is raised. 2. A balancer beam is lifted up and down from one side of the structure alternately, and a spacer is inserted or removed between the balancer beam and the ground. The jack-up method for a structure described in (1). 3. A telescopic actuator is pivotally mounted between one side of a balancer beam pivotally supported at its lower portion at the lower bottom of the structure and a side of the structure. A jack-up device for a structure having a driving capacity sufficient for one side of the balancer beam to float by a reaction force from the ground side due to driving of an actuator. 4. The balancer beam according to claim 3, wherein traveling wheels are mounted on at least both sides of a bottom portion of the balancer beam, and when the balancer beam floats on one side, the wheel on one side also floats on the ground. Jack-up device for structures.